I'm trying to connect two machines together. I know that I can't just connect immediately without doing some testing beforehand, like for NAT. I got this script from the Unity documentation. I think it's supposed to determine if NAT should be used or not, but some parts look a little messed up to me:
1) The line that says "case ConnectionTesterStatus.NATpuchthroughAddressRestrictedCone:" doesn't execute any code. 2) There are 2 case's that say "ConnectionTesterStatus.LimitedNATPunchthroughPortRestricted:"
As of right now I am unable to establish a connection with this script. Are there any network experts that can fix this script up for me so I can actually make a simple connection?
var testStatus = "Testing network connection capabilities.";
var testMessage = "Test in progress";
var shouldEnableNatMessage : String = "";
var doneTesting = false;
var probingPublicIP = false;
var serverPort = 9999;
var connectionTestResult = ConnectionTesterStatus.Undetermined;
// Indicates if the useNat parameter be enabled when starting a server
var useNat = false;
function OnGUI() {
GUILayout.Label("Current Status: " + testStatus);
GUILayout.Label("Test result : " + testMessage);
GUILayout.Label(shouldEnableNatMessage);
if (!doneTesting)
TestConnection();
}
function TestConnection() {
// Start/Poll the connection test, report the results in a label and
// react to the results accordingly
connectionTestResult = Network.TestConnection();
switch (connectionTestResult) {
case ConnectionTesterStatus.Error:
testMessage = "Problem determining NAT capabilities";
doneTesting = true;
break;
case ConnectionTesterStatus.Undetermined:
testMessage = "Undetermined NAT capabilities";
doneTesting = false;
break;
case ConnectionTesterStatus.PublicIPIsConnectable:
testMessage = "Directly connectable public IP address.";
useNat = false;
doneTesting = true;
break;
// This case is a bit special as we now need to check if we can
// circumvent the blocking by using NAT punchthrough
case ConnectionTesterStatus.PublicIPPortBlocked:
testMessage = "Non-connectble public IP address (port " +
serverPort +" blocked), running a server is impossible.";
useNat = false;
// If no NAT punchthrough test has been performed on this public
// IP, force a test
if (!probingPublicIP) {
connectionTestResult = Network.TestConnectionNAT();
probingPublicIP = true;
testStatus = "Testing if blocked public IP can be circumvented";
timer = Time.time + 10;
}
// NAT punchthrough test was performed but we still get blocked
else if (Time.time > timer) {
probingPublicIP = false; // reset
useNat = true;
doneTesting = true;
}
break;
case ConnectionTesterStatus.PublicIPNoServerStarted:
testMessage = "Public IP address but server not initialized, "+
"it must be started to check server accessibility. Restart "+
"connection test when ready.";
break;
case ConnectionTesterStatus.LimitedNATPunchthroughPortRestricted:
testMessage = "Limited NAT punchthrough capabilities. Cannot "+
"connect to all types of NAT servers.";
useNat = true;
doneTesting = true;
break;
case ConnectionTesterStatus.LimitedNATPunchthroughPortRestricted:
testMessage = "Limited NAT punchthrough capabilities. Cannot "+
"connect to all types of NAT servers. Running a server "+
"is ill advised as not everyone can connect.";
useNat = true;
doneTesting = true;
break;
case ConnectionTesterStatus.LimitedNATPunchthroughSymmetric:
testMessage = "Limited NAT punchthrough capabilities. Cannot "+
"connect to all types of NAT servers. Running a server "+
"is ill advised as not everyone can connect.";
useNat = true;
doneTesting = true;
break;
case ConnectionTesterStatus.NATpunchthroughAddressRestrictedCone:
case ConnectionTesterStatus.NATpunchthroughFullCone:
testMessage = "NAT punchthrough capable. Can connect to all "+
"servers and receive connections from all clients. Enabling "+
"NAT punchthrough functionality.";
useNat = true;
doneTesting = true;
break;
default:
testMessage = "Error in test routine, got " + connectionTestResult;
}
if (doneTesting) {
if (useNat)
shouldEnableNatMessage = "When starting a server the NAT "+
"punchthrough feature should be enabled (useNat parameter)";
else
shouldEnableNatMessage = "NAT punchthrough not needed";
testStatus = "Done testing";
}
}